2026-09-18T21:42:40Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/855122026-06-06T00:49:20Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Steven B. Leeb and Al-Thaddeus Avestruz.
Thompson, William H., M. Eng. Massachusetts Institute of Technology
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
2014-03-06T15:47:22Z
2014-03-06T15:47:22Z
2012
2013
http://hdl.handle.net/1721.1/85512
871036141
Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, February 2013.
Cataloged from PDF version of thesis. "September 2012."
Includes bibliographical references (pages 169-170).
This thesis presents the design and implementation of a standalone, capacitively coupled, occupancy sensor. Unlike previous iterations, the new sensor is decoupled from the fluorescent lamp. A well controlled, high voltage amplifier and autotransformer are designed as a replacement source and operate over a wide range of output frequencies and amplitudes. The sensor electronics are implemented with active sensing electrodes and resistive and capacitive feedback modes are evaluated for performance. Optimal front end feedback, electrode spacing, and signal source amplitude are explored. The sensor achieves a detection range of 11 feet for occupancy detection, with capacitive measurements down to the attofarad level. The application of the sensor as a material detector, using a linear mixing algorithm, is also found to be feasible.
by William H. Thompson.
M.Eng.
170 pages
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
A standalone capacitively coupled occupancy sensor
Thesis
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